Create posts daily on our Facebook and Instagram

We have a store selling building materials like doors, tiles, faucets, hinges, etc. now looking for a person to create and publish posts and Ad on Facebook and Instagram. The candidate should have experience promoting products via Facebook, good writing skills and a little knowledge of building materials and design.
Posts need to be published in groups. New groups should be joined periodically.
3 posts weekly, 3-4 Ad Facebook listings.